2010 EK139

2010 EK139

Discovery[1]
Discovered by A. Udalski
S. S. Sheppard
M. Kubiak
C. Trujillo
Las Campanas Observatory (304)
Discovery date 13 March 2010
Designations
MPC designation 2010 EK139
TNO (SDO)[2]
2:7[3]
Orbital characteristics[4]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 3
Observation arc 3314 days (9.07 yr)
Aphelion 107.43 AU (16.071 Tm) (Q)
Perihelion 32.576 AU (4.8733 Tm) (q)
70.002 AU (10.4722 Tm) (a)
Eccentricity 0.53465 (e)
585.70 yr (213928 d)
346.07° (M)
Inclination 29.4230° (i)
346.0877° (Ω)
284.29° (ω)
Known satellites None[5]
Earth MOID 31.684 AU (4.7399 Tm)
Jupiter MOID 28.0751 AU (4.19998 Tm)
Physical characteristics
Dimensions 470+35
−10 km[5]
7.07 h (0.295 d)
0.295 d (7.07 h)[4]
0.25+0.02
−0.05[5]
19.9[6]
19.6R[3]
3.8 ± 0.1,[5] 3.8[4]

    2010 EK139[7] is a trans-Neptunian object orbiting the Sun in the scattered disc. It was discovered in 2010 by astronomers from the OGLE team led by Andrzej Udalski from Warsaw University.[8] With an absolute magnitude (H) of 3.8,[4] it is very likely a dwarf planet.[9]

    Distance

    It will come to perihelion around 2038[4] and is currently 39.1 AU from the Sun.[6]

    It has been observed 122 times over five oppositions and has an orbit quality of 2.[4] There are precovery images dating back to 2002.[3] A ten-million-year integration of the orbit shows that this object is in a 2:7 resonance with Neptune.[3]

    Physical properties

    In 2010, the thermal radiation of 2010 EK139 was observed by the Herschel Space Telescope, which allowed astronomers to estimate its diameter at about 470 kilometres (290 mi).[5]

    Observations by Mike Brown, using the Keck telescope in March 2012, suggest that there is no satellite, which makes determination of its mass impossible.[5]

    See also

    References

    1. ↑ "MPEC 2010-G49 : 2010 EK139". IAU Minor Planet Center. 2010-04-08. Retrieved 2010-12-03.
    2. ↑ "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 2010-12-02.
    3. 1 2 3 4 Marc W. Buie. "Orbit Fit and Astrometric record for 10EK139" (2010-04-09 using 32 of 32 observations). SwRI (Space Science Department). Retrieved 2010-12-02.
    4. 1 2 3 4 5 6 "JPL Small-Body Database Browser: (2010 EK139)" (2011-04-11 last obs). Retrieved 31 March 2016.
    5. 1 2 3 4 5 6 Pál, A.; Kiss, C.; Müller, T. G.; Santos-Sanz, P.; Vilenius, E.; Szalai, N.; Mommert, M.; Lellouch, E.; Rengel, M.; Hartogh, P.; Protopapa, S.; Stansberry, J.; Ortiz, J. -L.; Duffard, R.; Thirouin, A.; Henry, F.; Delsanti, A. (2012). ""TNOs are Cool": A survey of the trans-Neptunian region. VII. Size and surface characteristics of (90377) Sedna and 2010 EK139". Astronomy & Astrophysics 541: L6. arXiv:1204.0899. Bibcode:2012A&A...541L...6P. doi:10.1051/0004-6361/201218874.
    6. 1 2 "AstDys 2010EK139 Ephemerides". Department of Mathematics, University of Pisa, Italy. Retrieved 2010-12-11.
    7. ↑ "MPEC 2010 G50 : 2010 EK139". MPC. 8 April 2010. Archived from the original on 14 May 2010. Retrieved 4 May 2010.
    8. ↑ Krzysztof Urbański (4 May 2010). "Układ Słoneczny coraz większy". Rzeczpospolita. Retrieved 4 May 2010. (English translation)
    9. ↑ Michael E. Brown. "How many dwarf planets are there in the outer solar system? (updates daily)". California Institute of Technology. Retrieved 2012-05-08.

    External links

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